Furnace.



110.787,63@ PATBNTBD APR. 18,'1905.

H.- A. POPPBNHUSBN. FURNAGE.

APPLICATION FILED HAR. 21, 1904. n

UNITED STATES Patented Aprll 18, 1905.

PATENT OEEICE.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 787,636, dated April 18, 1905.

Application filed March 2l, 1904. Serial No. 199,169.

To a/ZZ whom, it may concern:

Be it known that I, HERMAN A. POPPENHU- sEN, of Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings,.and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to improvements in furnaces of that kind having an endless traveling grate by which fuel delivered at the feed-opening of the furnace is fed inwardly or advanced through the furnace while combustion is taking place, and more especially to features of construction by which close joints may be provided between the margins of the upper lap of the traveling grate on which the fuel rests and the side walls of the i furnace to prevent upward passage of air between said margins of the grate and the side walls of the furnace, and thereby insure the passage of all of the air admitted to beneath the grate through the grate and the layer of fuel resting thereon and prevent the fuel from dropping off the grate.

rIhe invention consists in the matters hereinafter described, and pointed out in the appended claims.

As shown in the accompanying drawings, Figure l is a cross-section taken through the lower part of the side Wall of a furnace and also through one of the side plates of a grate-supporting frame and the edges of the upper and lower laps of the traveling chain grate. Fig. 2 is a perspective view of a supporting-plate which is inserted horizontally in the side Wall of the furnace with an adjustable plate connected therewith. Fig. 3 is a perspective view of one of the adjustable plates separate from the other parts.

Y As shown in the said drawings, A indicates one of the side walls of a boiler or other furnace; B, an endless chain or traveling grate; O O, two of the supporting-rollers on which the upper and lower laps of the grate rest and by which they are sustained in a horizontal position during their traveling movement,

porting-frame in which the said rollers are mounted. In the construction illustrated said frame is provided with supporting-Wheels, one ofwhich is indicated at E, which travel on track-rails, one of which is indicated at F, whereby said frame and the grate may be removed from and inserted into the furnace.

The side wall of the furnace is provided with a recess to receive the side frame-plate I), and the supporting-rail F is located at the bottom of said recess. The side wall A above the recess in which the side plate is located is extended inwardly to form a projecting part A', which is supported by means of a horizontal metal plate G, said plate being lo- 4 cated at or near the level of the upper lap of the grate, and theupper margin of the side frame-plate D and the bearings for the upper supporting-rollers O are located within the said recess and below the said supportingplate Gr, as heretofore common in similar furnaces. In grates of this character it is highly desirable that all of the air entering beneath the upper lap of the grate on which the burning fuel rests should pass through the upper lap and through the layer of fuel thereon.

My invention is designed to provide a means for effectively preventing the upward passage of air between the edge of the grate and the side wall of the furnace, and for this purpose I provide laterally-adjustable and detachable plates H, the inner margins of which are located parallel with the edges of the upper lap of the grate and whichare so mounted or supported on the side wall that they may be shifted horizontally toward and from said edge of the grate. The plates H thus arranged and supported may be adjusted soas to bring their inner margins as close to the edges of the grate as is possible without actual contact therewith, and thereby practically close the space between the grate and furnace-wall against the upward passage of air.

By reason of inaccuracies necessarily arising from the heavy and rough character of the Workin the masonry Wall and other parts of the furnace it is practically impossible to secure such accurate adjustment of the location of the inner faceof the inwardly-projectand D one of the side frame-plates of a supf IOO ing part A of the side wall with respect to the margin of the upper lap of the grate as will afford a suitable closure between the parts and at the same time leave the grate entirely free from contact with the side walls in its movement. Moreover, the supporting-plate G in itself, if it be made to project beyond the brickwork, so as to bring its edge close to the grate,jwould then become exposed to the burning fuel and would quickly become warped or destroyed. A plate H, which is removably and adjustably connected with the side wall, may, however, not only be adjusted accurately with respect to the margins of the upper lap of the grate, but may also be easily replaced at little expense in case it should become so injured by heat as to be no longer useful.

As a further improvementr I provide upon the adjustable plates H a vertical flange H', which constitutes the marginal parts of the said plates adjacent to the edge of the grate. Such marginal flange is of great advantage, because the top of the grate is not always exactly horizontal, but may sag to a greater or less extent between the supporting-rollers, and because, by reason of the rough and heavy construction of the parts, the supporting-plate G may not always be in exact horizontal alinement or register with the marginal part of the lap of the grate. By providing the adjustable plates with vertically-extending marginal flanges H a suitable closure may be always maintained between the adjustable plate and the margin of the grate to prevent the escape of air between said marginal part of the grate and plates H notwithstanding variations in the vertical position of the said upper lap of the grate with respect to the body or horizontal part of said plate H.

As shown in the drawings, the plate H is made in parts or sections which are detachably and adjustably connected with the supportingplate Gr by devices as follows: Said plate G is provided near its outer margin with longitudinal slots or bolt-apertu res f/, while the plates H are provided with transverse slots t, which open through the inner margins of said plates. Bolts l are inserted vertically through the said apertures g and slots /L and are provided with nuts on their lower ends,which are readily accessble when the grate and its frame are withdrawn from the furnace. Preferably parallel iianges g are located on either side of the apertures g, said flanges being adapted for contact with the opposite flatsides of squareheaded bolts, so as to prevent the bolts from turning in applying the nuts to and removing them from the lower ends of the bolts. This construction enables the plates H to be very readily removed or adjusted, it being merely necessary to loosen the nuts on the lower end of the bolts when it is desired to shift or remove the said plates. The said plates H are preferably made in relatively short pieces or sections, so that in case the margins of the plates which are exposed to the heat of the fuel are injured thereby the damaged parts only need be replaced. The making of the bolt-holes g in the form of longitudinally-extending apertures is preferred, because it enables the sections or plates H to be adjusted endwise and to be brought closely into contact with each other at their ends notwithstanding irregularities or roughness in the castings of which the plates are composed.

While I have shown the adjustable plates as secured to the side wall of the furnace through the medium of or attachment to a plate G, which is embedded in said side wall and supports the projecting part A of the wall above it, yet` so far as the general features of my improvements are concerned adjustable plates adapted to operate in the same manner to produce the same results may be otherwise connected with or supported from the said side wall, it being obvious thatlateraladjustability of suitably-located plates with respect to the margins of the grate may be effected in a variety of ways. In its broader aspect my invention is not, therefore, limited to the details of construction illustrated in means for supporting and adjusting said plates.

The particular features of construction illustrated and above described in the means for adjustably supporting or retaining the said plates H, however, have advantages in point of simplicity, ease of replacement and adjustment, and cheapness in construction, and such features are also claimed as part of my invention.

I claim as my inventionl. The combination with a furnace side wall and an endless traveling grate, of a plate for closing the space between the said side wall and grate and means for positively adjusting said plate on the side wall toward and from the margin of the grate.

2. The combination with a furnace side wall and an endless traveling grate, of a plate for closing the space between the said, side wall and the grate which is detachably supported on the side wall and means for positively adj usting the plate toward and from the margin of the grate.

3. The combination'with a furnace side wall and an endless traveling grate, of a plate for closing the space between the said side wall and the margin of the grate, consisting of a plate which is adjustable on the side wall toward and from the margin of the grate and is provided with a vertically-extending marginal iiange.

4C. The combination with the side wall of a furnace provided with a recess and with a horizontal supporting plate which extends inwardly from said wall at the upper side of said recess, a frame,'the end parts of which extend into said recess and an endless traveling grate supported on said frame, of a plate for closing the space between said side wall and IOO IIO

the margin of the grate which is detachably and adjustably secu red to the said supportingplate.

5. The combination with the side Wall of a furnace provided with a recess and with a horizontal apertured supporting-plate which eX- tends inwardly from said side Wall at the upper side of said recess, a frame the end parts of which extend into said recess, and an endless traveling grate supported on said frame, of a laterally-adjustable plate for closing the space between said side wall and the margin of said grate said adjustable plate being provided with transverse slots, and bolts inserted through the apertures in the supporting-plate and said slots for securing the adjustable plate to the supporting-plate.

6. The combination with the side wall of a furnace provided with a recess and with a horizontal apertured supporting-plate which extends inwardly from said side Wall at the upper side of said recess, a frame the end parts of which extend into said recess and an endless traveling grate supported on said frame, of a laterally-adjustable plate for closing the space between the said side wall and the margin of s'aid grate, said adjustable plate beingA HERMAN A. POPPENHUSEN.

Witnesses:

WILLIAM L. HALL, GERTRUDE BRYGE. 

